Bibcode
Fuensalida, J. J.; Rosa, F.; Fuentes, F. J.
Referencia bibliográfica
Astronomy and Astrophysics (ISSN 0004-6361), vol. 191, no. 2, Feb. 1988, p. L13-L15.
Fecha de publicación:
2
1988
Número de citas
11
Número de citas referidas
11
Descripción
H-alpha observations of AG Peg, obtained using an IPCS detector on the
2.5-m Isaac Newton Telescope of the Observatorio del Roque de Los
Muchachos on November 13-14, 1986, are reported. A mask reducing the
effective entrance aperture to 55 cm and a neutral filter limiting the
photon flux to 14 photons/frame were employed in 15-msec/frame exposures
(total exposure time 790 sec), and the frame recentering and selection
algorithm of Rosa and Fuensalida (1987) was applied to improve the
sharpness of the H-alpha image. AG Peg is shown to have a SE lobe about
4 arcsec from its center, a more intense and concentrated NW lobe about
5 arcsec from center, and an unresolved emission source less than 1.7
arcsec NE of center. With background subtracted, the external nebulosity
is found to account for about 33 percent of the total H-alpha emission.